feat: add utilities isPowerOfTwo and nextPowerOfTwo

src/utils/__tests__/isPowerOfTwo.test.ts

@@ -0,0 +1,7 @@
+import { isPowerOfTwo } from '../..';
+
+test('check if a power of two is next', () => {
+  expect(isPowerOfTwo(1024)).toEqual(true);
+  expect(isPowerOfTwo(1025)).toEqual(false);
+  expect(isPowerOfTwo(1023)).toEqual(false);
+});

src/utils/__tests__/nextPowerOfTwo.test.ts

@@ -0,0 +1,7 @@
+import { nextPowerOfTwo } from '../..';
+
+test('check if a power of two is next', () => {
+  expect(nextPowerOfTwo(1024)).toEqual(1024);
+  expect(nextPowerOfTwo(1025)).toEqual(2048);
+  expect(nextPowerOfTwo(1023)).toEqual(1024);
+});

src/utils/index.ts

@@ -2,3 +2,5 @@ export * from './createFromToArray';
 export * from './createRandomArray';
 export * from './createStepArray';
 export * from './getRescaler';
+export * from './isPowerOfTwo';
+export * from './nextPowerOfTwo';

src/utils/isPowerOfTwo.ts

@@ -0,0 +1,7 @@
+/**
+ * Check if a number is a power of two
+ */
+
+export function isPowerOfTwo(n: number): boolean {
+  return n !== 0 && (n & (n - 1)) === 0;
+}

src/utils/nextPowerOfTwo.ts

@@ -0,0 +1,13 @@
+/**
+ * Get the size of the next power of two
+ */
+export function nextPowerOfTwo(n: number): number {
+  if (n === 0) return 1;
+  n--;
+  n |= n >> 1;
+  n |= n >> 2;
+  n |= n >> 4;
+  n |= n >> 8;
+  n |= n >> 16;
+  return n + 1;
+}